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ESR investigation of the spin dynamics in (Gd1−xYx)2PdSi3

By J. Deisenhofer, H. -a. Krug Von Nidda, A. Loidl and E. V. Sampathkumaran


We report electron-spin resonance measurements in polycrystalline samples of (Gd1−xYx)2PdSi3. We observe the onset of a broadening of the linewidth and of a decrease of the resonance field at approximately twice the Néel temperature in the paramagnetic state, this characteristic temperature coincides with the electrical resistivity minimum. The high-temperature behaviour of the linewidth is governed by a strong bottleneck effect

Topics: Key words, Electron Spin Resonance, Gd alloys, magnetoresistance PACS, 76.30.-v, 75.30.Vn, 75.30.Kz
Year: 2002
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